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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you under
* the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.elasticsearch.search.highlight.vectorhighlight;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.TextField;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.search.vectorhighlight.BoundaryScanner;
import org.elasticsearch.index.mapper.FieldMapper;
import org.elasticsearch.search.internal.SearchContext;
import org.elasticsearch.search.lookup.SourceLookup;
import java.io.IOException;
import java.util.List;
/**
*
*/
public class SourceSimpleFragmentsBuilder extends SimpleFragmentsBuilder {
private final SearchContext searchContext;
public SourceSimpleFragmentsBuilder(FieldMapper mapper, SearchContext searchContext, String[] preTags, String[] postTags,
BoundaryScanner boundaryScanner) {
super(mapper, preTags, postTags, boundaryScanner);
this.searchContext = searchContext;
}
public static final Field[] EMPTY_FIELDS = new Field[0];
@Override
protected Field[] getFields(IndexReader reader, int docId, String fieldName) throws IOException {
// we know its low level reader, and matching docId, since that's how we call the highlighter with
SourceLookup sourceLookup = searchContext.lookup().source();
sourceLookup.setSegmentAndDocument((LeafReaderContext) reader.getContext(), docId);
List<Object> values = sourceLookup.extractRawValues(mapper.fieldType().name());
if (values.isEmpty()) {
return EMPTY_FIELDS;
}
Field[] fields = new Field[values.size()];
for (int i = 0; i < values.size(); i++) {
fields[i] = new Field(mapper.fieldType().name(), values.get(i).toString(), TextField.TYPE_NOT_STORED);
}
return fields;
}
}
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